Well, I think it lends a bit of objectivity to the subject when you have not seen one. I mean what have you and countless others actually seen?? And have you ever second guessed yourself that what you may have saw (or any number of others) is a powerful product of your brain and any number of interactions of the nearby environment?? Or that they may be a delusion?? Or whatever?? Perhaps it is the interpretation of what is experienced by the observer that is in question.
I'm not saying that is neccessarily true, but if you have no bias as having seen one it may help a researcher stay objective to a degree. On the other hand I'm quite confident that some "researchers" don't give a crap and would rather just sell books or become that opportunist speaker.
But there are lots of things I've never seen that I believe is true. I think Australia exists. I've seen pictures. Some people here claim to be from there. It probably exists. I've also experienced deja vu. It certainly seemed like I had played out the exact same sequence at some other point in time. So did I really experience something in a different moment in time or is this some weird glitch in my brain?? I hope you get my point and take it for what its worth.
Either way I still find the topic of great interest. Whatever is actually happening, the phenomenon is real. What the phenomenon means is a different story. I can imagine that there are real engimatic phenomenon that exist in our universe that we couldn't even possibly begin to imagine. Oxymoron, I know. Hope I made some kind of sense, I'm starting to lose myself.
"Expert" labeling is used very loosely and I never put much credence in that label. Some definitely know a lot more than others, but the term is almost a warning sign depending on who is using it, that they probably aren't an "expert". An expert would really know what the hell is going on. "Student" seems a more reasonable amd honest word, but what kind of people want to listen to a UFO "student"??